2022. Convert 1D Array Into 2D Array 這次算簡單， 但是要判斷無法建立 2D array 的要求滿多餘的。 練習用 iterator 寫寫看 class Solution { public: vector<vector<int>> construct2DArray(vector<int>& original, int m, int n) { if (original.size() != m * n) { return vector<vector<int>>(); } vector<vector<int>> result; for (int i = 0; i < m; i++) { int startIndex = i * n; int endInex = (i + 1) * n; // exclusive index vector<int> subArray(next(original.cbegin(), startIndex), next(original.cbegin(), endInex)); result.emplace_back(subArray); } return result; } }; -- https://i.imgur.com/dVRdutZ.png -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 125.228.71.204 (臺灣) ※ 文章網址: https://www.ptt.cc/bbs/Marginalman/M.1725160758.A.036.html